There are so many kits out there for the main hoop and side bars,it's hardly worth going threw what you are.Then you just take the material you have fish mouth it to "X" it or "Z" it in.Your going to find as you add bars to the main hoop how solid the main hoop gets.Tight seams are key.This assumes your as good welder.Yrs ago I did see a roll bar fail in a rollover.The bars ginzoo'ed the driver causing serious injury and he ended up loosing a leg.Not a pretty sight.